Uv Accelerated Aging
Uv Accelerated Aging - Related Videos
10:58
Obtaining Specimens with Slowed, Accelerated and Reversed Aging in the Honey Bee Model
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Cited by 19 •
2013
In honey bee workers, aging depends on social behaviors rather than on chronological age. Here we show how worker-types with very different aging patterns can be obtained and analyzed for cellular senescence.
08:00
Force and Acceleration
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2023
Source: Nicholas Timmons, Asantha Cooray, PhD, Department of Physics & Astronomy, School of Physical Sciences, University of California, Irvine, CA The goal of this experiment is to understand the components of force and their relation to motion through the use of Newton's second law by measuring the acceleration of a glider being acted upon by a force. Nearly every aspect of motion in everyday life can be described using Isaac Newton's three laws of motion. They describe how objects in...
10:41
Continuous High-resolution Microscopic Observation of Replicative Aging in Budding Yeast
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Cited by 10 •
2013
We describe here the operation of a microfluidic device that allows continuous and high-resolution microscopic imaging of single budding yeast cells during their complete replicative and/or chronological lifespan.
04:55
UV-Vis Spectroscopy of Dyes - Concepts
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2020
Absorbance When light interacts with a substance, a portion of the light is absorbed while the rest is either reflected or transmitted through it. Substances that we perceive as having a color reflect light in the visible range. The color of the substance that we are able to see depends on which wavelength of light is reflected. A substance that we perceive as blue reflects light in the blue range (430 – 480 nm) of the visible spectrum. According to the color wheel, the same substance absorbs...
03:40
UV Irradiation: A Method to Integrate Extrachromosomal Arrays
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2023
Microinjection of transgenes usually results in C. elegans strains with large extrachromosomal arrays, which result in variable expression and transmission of the transgene. UV Irradiation can induce chromosomal integration of the array and more stable transgene transmission.
FAQs
Ultraviolet radiation promotes photochemical reactions within exposed materials. These reactions can cause polymer-chain scission, which breaks molecular structures, or cross-linking, which alters how chains interact. Oxidation may develop alongside these changes, contributing to discoloration, surface cracking, and reduced mechanical strength. The resulting degradation pattern helps engineers connect visible damage with underlying material changes.
Temperature and moisture cycles work alongside ultraviolet radiation to create controlled exposure conditions rather than relying on radiation alone. Together, these factors can influence the development of oxidation, cracking, discoloration, and strength loss. Controlling the cycles allows researchers to compare specimens under repeatable laboratory conditions and examine how environmental stresses contribute to deterioration.
Materials may respond through different combinations of polymer-chain scission, oxidation, cross-linking, discoloration, and surface cracking. Chain scission and oxidation can be associated with changes in mechanical strength, while cross-linking may alter the material structure. Identifying the dominant damage pattern helps engineers compare formulations, recognize likely failure modes, and determine whether a protective strategy changes the response.
Researchers compare specimens subjected to the controlled exposure with unaged controls that represent the starting condition. This comparison reveals changes such as discoloration, surface cracking, or loss of mechanical strength rather than relying only on the exposed specimen’s final appearance. The contrast supports evaluation of deterioration and helps identify differences among materials, treatments, or product designs.
A material can be tested before and after applying a protective additive or surface treatment, then compared with an unaged control and relevant untreated specimens. Differences in cracking, discoloration, oxidation-related damage, or mechanical-strength loss indicate whether the intervention changes the degradation response. This approach supports screening of protection strategies for coatings, plastics, textiles, composites, and outdoor components.
Engineers can use this testing when outdoor durability is an important design consideration for coatings, plastics, textiles, composites, or other exposed components. Results help compare candidate materials, identify failure modes, and guide product improvements. However, accelerated exposure should not be treated as a complete substitute for natural weathering, because laboratory conditions may not reproduce every aspect of sunlight-driven deterioration.